feat: 📈 add analytics banner component and privacy policy

src/layouts/page.webc

@@ -0,0 +1,44 @@
+---
+layout: base.webc
+---
+
+<main>
+  <page-content>
+    <h1 @text="$data.title || $data.eleventyNavigation.key"></h1>
+    <template @raw="content" webc:nokeep></template>
+  </page-content>
+
+  <page-footer></page-footer>
+</main>
+
+<style>
+  main {
+    --inbox-spacing: 1rem;
+
+    display: grid;
+    justify-content: center;
+    justify-items: center;
+    align-items: start;
+    gap: 1em;
+    grid-auto-columns: 100%;
+    grid-template-areas:
+      'content'
+      'footer';
+
+    margin-block: var(--container-spacing-top-safe) var(--container-spacing-bottom-safe);
+    margin-inline: var(--container-spacing-left-safe) var(--container-spacing-right-safe);
+
+    margin-block: var(--page-spacing);
+
+    @media (min-width: 64em) {
+      --inbox-spacing: 1.5rem;
+
+      grid-auto-columns: revert;
+      grid-template-columns: minmax(0, 65ch);
+    }
+  }
+
+  h1 {
+    margin-inline: var(--inbox-spacing);
+  }
+</style>